The effect of adding various levels of Sodium fluoride to the ration on performance of Hisex parent stock layers

alimentation des animaux animal feeding animal femelle animales hembra consommation alimentaire (animaux) consumo de piensos coquille d'oeuf egg shell espesor feed consumption feed conversion efficiency feed intake female animals fluor fluorine gallina ponedora layer chickens laying performance mortalidad mortalite mortality oviposition padres parent parents performance de ponte peso poids poule pondeuse prise alimentaire (animaux) rendimiento en la postura thickness weight